From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id C8242480DEE; Tue, 14 Jul 2026 14:07:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784038079; cv=none; b=BnNMNxTCGn+kWkegZSkP7Hb16YJv7ND5D9fKnCCFGl9y6vm4hw8AXocm0CXul+t3FkX4RkeNRmas9MHqyuodZ3pg1U0FSxJWzoAUYQlSpNpWpPsGeSbKlEL3U49F6f/su1Y/qdB3tdkHzNQ2OesK5MOYwg95nWq6H1r1J2SM9qc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784038079; c=relaxed/simple; bh=8oYQ9MXuYWmm90weLSF/t4FrSgRMmgMLSgcdK785vME=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=rhJqAEIOHR0eALh8+seMB9lTpXJdRYPBDJE9e2+akxowzOU6bVCHJ6PupmpdGWUqS9DpL9ZSxOW1GsjLBOoEon34vJ3a2VJTYCXrRt6rJ5CDUHTz39HMayU+ukYc4iDAl6dRsTGXdK4L8YAYMo9KUl8Tp4DGPQpncjiHLG99GV8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=vjhfq5hu; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="vjhfq5hu" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 329B21DB5; Tue, 14 Jul 2026 07:07:48 -0700 (PDT) Received: from localhost.localdomain (e123572-lin.cambridge.arm.com [10.2.208.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0A8183F7B4; Tue, 14 Jul 2026 07:07:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1784038072; bh=8oYQ9MXuYWmm90weLSF/t4FrSgRMmgMLSgcdK785vME=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=vjhfq5hujZgmkhySuJNw6Ovi0ZDPllrwytdpUl1CFaMMmQ7YlrA+FTdxr6ytaSSAO 1u9NsJ08KRRDg8iJcOgusKSxciglroRswKdfyUOkoGu8QXjmncAKV2aqeRer5z/ygB q8OYyTsSmA+9Qr1jQYJQdHlBqhCMBgipf8FFPhm0= From: Kevin Brodsky Date: Tue, 14 Jul 2026 15:04:10 +0100 Subject: [PATCH 21/22] arm: mm: drop ctor call for kernel page tables Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260714-remove_pgtable_cdtor-v1-21-44be8a7685d7@arm.com> References: <20260714-remove_pgtable_cdtor-v1-0-44be8a7685d7@arm.com> In-Reply-To: <20260714-remove_pgtable_cdtor-v1-0-44be8a7685d7@arm.com> To: linux-mm@kvack.org Cc: Kevin Brodsky , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Pasha Tatashin , Russell King , Catalin Marinas , Will Deacon , Ryan Roberts , linux-arm-kernel@lists.infradead.org, Huacai Chen , loongarch@lists.linux.dev, "James E.J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org, Madhavan Srinivasan , Michael Ellerman , linuxppc-dev@lists.ozlabs.org, Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Gerald Schaefer , linux-s390@vger.kernel.org, "David S. Miller" , Andreas Larsson , sparclinux@vger.kernel.org, Richard Weinberger , Anton Ivanov , Johannes Berg , linux-um@lists.infradead.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Ning Sun , x86@kernel.org, tboot-devel@lists.sourceforge.net, Ard Biesheuvel , Ilias Apalodimas , linux-efi@vger.kernel.org, Vishal Moola , Alistair Popple , "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1784037902; l=861; i=kevin.brodsky@arm.com; s=20260427; h=from:subject:message-id; bh=8oYQ9MXuYWmm90weLSF/t4FrSgRMmgMLSgcdK785vME=; b=nhPVpPwxc0Tgep45F4r22gVJiYH4IqNiA/Z9S3Ix77hbH+m9X9zzxN6EovZVFIEF1e8oAreuL YHrL6dXW1utB0IBYjmbnRvx5pXQ0zPIU5EqMprfu37YqfA5Aaxh0XUC X-Developer-Key: i=kevin.brodsky@arm.com; a=ed25519; pk=N2QG+eJKrvkNovwhhwJhnJ4+ScVfsGCHldmqLfcMTFs= Thanks to recent changes: * pagetable_pte_ctor() does nothing for kernel page tables. * efi_mm is also treated like a kernel mm by the page table logic, including ctors. We can therefore drop the ctor call when allocating special kernel page tables in mmu.c. Signed-off-by: Kevin Brodsky --- arch/arm/mm/mmu.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 23b87b5ef7f1..c8de77a6f01e 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -728,8 +728,7 @@ static void *__init late_alloc(unsigned long sz) void *ptdesc = pagetable_alloc(GFP_PGTABLE_KERNEL & ~__GFP_HIGHMEM, get_order(sz)); - if (!ptdesc || !pagetable_pte_ctor(NULL, ptdesc)) - BUG(); + BUG_ON(!ptdesc); return ptdesc_address(ptdesc); } -- 2.51.2